CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME (USD $) In Millions, unless otherwise specified	3 Months Ended
	Mar. 31, 2013	Mar. 31, 2012
CONSOLIDATED STATEMENTS OF COMPREHENSIVE INCOME
Net income	$ 384.9	$ 401.5
Other comprehensive income (loss):
Foreign currency translation adjustments	(5.9)	18.4
Change in functional currency of a foreign subsidiary		13.1
Net unrealized gains (losses) related to cash flow hedges:
Unrealized holding gains (losses), net of tax expense (benefit) of $0.2 for the three-months ended March 31, 2013, and 2012, respectively	74.9	23.3
Reclassification adjustment for (gains) losses included in net income, net of tax (expense) benefit of $3.4 and ($2.6) for the three-months ended March 31, 2013 and 2012, respectively	3.8	(16.4)
Net unrealized gains (losses) on marketable securities available for sale:
Unrealized holding gains (losses), net of tax expense (benefit) of $0 for the three-months ended March 31, 2013 and 2012, respectively	(1.9)	2.5
Reclassification adjustment for (gains) losses included in net income, net of tax (expense) benefit of $0 for the three-months ended March 31, 2013 and 2012, respectively	0.8	(0.4)
Total other comprehensive income (loss)	71.7	40.5
Comprehensive income	$ 456.6	$ 442.0